​

    editedUTC: number = 0;

​

    private _byName: { [fullPath: string]: HTMLElement; } = {};

​

    constructor(

      private _parentElement: HTMLElement,

      private _document: { createElement(tag: string): HTMLElement; }) {

​

      // populate editedUTC from corresponding attribute

      var editedUTCValue = this._parentElement.getAttribute('data-edited-utc');

      if (editedUTCValue) {

        try {

          this.editedUTC = parseInt(editedUTCValue);

        }

        catch (parseEditedUTCError) {

          // TODO: logging safely?

          //console.log('parsing editedUTC ' + parseEditedUTCError);

        }

      }

    }

​

    load(recipient: LoadStorageRecipient): void {

​

      this._ensureIdSet();

​

      var dodgyElements: HTMLElement[] = [];

​

      var fileCount: number = 0;

      try {

        var fileCountStr = this._parentElement.getAttribute('data-teapo-file-count');

        if (fileCountStr)

          fileCount = parseInt(fileCountStr);

      }

      catch (error) { }

​

      if (fileCountStr)

        recipient.files(fileCount);

​

      fileCount = 0;

      for (var i = 0; i < this._parentElement.children.length; i++) {

        var fileElement = this._parentElement.children[i];

        if (this._loadFromElement(fileElement, recipient))

          fileCount++;

        else

          dodgyElements.push(fileElement);

      }

​

      for (var i = 0; i < dodgyElements.length; i++) {

        this._parentElement.removeChild(dodgyElements[i]);

      }

​

      this._parentElement.setAttribute('data-teapo-file-count', <any>fileCount);

​

      var updater = this._createUpdater();

      recipient.completed(updater);

    }

​

    migrate(

      editedUTC: number,

      filesByName: { [fullPath: string]: { [propertyName: string]: string; }; },

      callback: (error: Error, updater: attached.UpdateStorage) => void): void {

​

      this._ensureIdSet();

​

      this._wipeExistingElement();

      if (editedUTC)

        this._parentElement.setAttribute('data-edited-utc', editedUTC + '');

      this.editedUTC = editedUTC;

      //console.log('migrate(' + editedUTC + ', ' , filesByName, this._parentElement);

​

​

      var fileCount = 0;

      if (filesByName) {

        for (var fullPath in filesByName) if (filesByName.hasOwnProperty(fullPath)) {

          fileCount++;

          var element = UpdateStorage.createElement(this._parentElement, fullPath, this._document);

          var pbag = filesByName[fullPath];